220244440 has 32 divisors (see below), whose sum is σ = 533670480. Its totient is φ = 81320832.

The previous prime is 220244393. The next prime is 220244441. The reversal of 220244440 is 44442022.

It is a super-2 number, since 2×220244440² = 97015226701827200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220244441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211254 + ... + 212293.

Almost surely, 2^220244440 is an apocalyptic number.

220244440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220244440 is an abundant number, since it is smaller than the sum of its proper divisors (313426040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220244440 is a wasteful number, since it uses less digits than its factorization.

220244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423571 (or 423567 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 220244440 is about 14840.6347573141. The cubic root of 220244440 is about 603.9045724420.

Adding to 220244440 its reverse (44442022), we get a palindrome (264686462).

The spelling of 220244440 in words is "two hundred twenty million, two hundred forty-four thousand, four hundred forty".